When Valeria was a little girl she never understood why people called her by a name that was not her own. The same happened to Cristina, misnamed Joselito at the time, who had to survive a violent and cruel childhood under Spain in the sixties. Two women who were born in very different times but who, by chance or by destiny, end up together forever, when Valeria, a journalism student, decides to write a book about the life of the iconic Cristina, La Veneno.

Valeria, determined to write the book about Veneno's memories, finds herself in more difficulties than she imagined. There is something important in Cristina's childhood, but she avoids it and refuses to talk about that part of her past: a difficult childhood in Adra, where a young Joselito has to face the rejection of other children and even his own. mother, who does not look favorably on the boy's mannered forms. Thus, Valeria will have to use all the weapons at her disposal to try to understand what happened during those years that forever marked the life of La Veneno.

In full compilation of Cristina's life, Valeria also faces her transit. She lives a physical and psychological change that will lead her to consider and discover the range of possibilities that exist around identity. Also to want to carry their sexuality to the end. Sexual awakening that he shares with Joselito's infatuation in the past when he meets Tomás, a friend of the family he lives with after escaping from Adra: Los Romero.

In the 90s, Joselito barely survived in Madrid. He is fired from a hospital kitchen for his ways and is seen on the street. It is at that moment when he meets Cristina Onassis, a trans woman who introduces him to the world of prostitution in Madrid, thus arriving at Parque del Oeste for the first time. At present, Veneno is completely unleashed by the excitement caused by her return to television, which causes Valeria a great lack of control because she cannot keep up with the frenetic pace of Cristina's life.